HK1246025A1 - Physical uplink control channel (pucch) resource allocation (ra) for a hybrid automatic retransmission re-quest-acknowledge (harq-ack) transmission - Google Patents

Abstract

Technology for a radio access network (RAN) node that is operable to report user plane congestion (UPCON) is disclosed. The RAN node may include computer circuitry configured to receive, from a Core Network (CN), an information element (IE) including UPCON related Policy and Control Charging (PCC) information. The RAN node may identify a location of an UPCON event, at the RAN node, based on an UPCON event trigger included in the UPCON related PCC information. The RAN node may report Radio Access Network Congestion Information (RCI) about the UPCON event to one or more network elements in the CN.

Description

Physical uplink control channel resource allocation for hybrid automatic repeat request-acknowledgement transmissions

The present application is a divisional application of applications entitled "Physical Uplink Control Channel (PUCCH) Resource Allocation (RA) for hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission" with PCT international application number PCT/US2013/048348, international application date 2013, 27.6.2013, chinese national application number 201380050392.6.

RELATED APPLICATIONS

The benefit of U.S. provisional patent application No. 61/719,241 filed on 26/10/2012 is claimed and is hereby incorporated by reference herein and is assigned attorney docket No. P50328Z.

Background

Wireless mobile communication technology uses various standards and protocols to transmit data between a node (e.g., a transmission station) and a wireless device (e.g., a mobile device). Some wireless devices communicate using Orthogonal Frequency Division Multiple Access (OFDMA) in Downlink (DL) transmissions and single carrier frequency division multiple access (SC-FDMA) in Uplink (UL) transmissions. Standards and protocols for signal transmission using Orthogonal Frequency Division Multiplexing (OFDMA) include the third generation partnership project (3GPP) Long Term Evolution (LTE), the Institute of Electrical and Electronics Engineers (IEEE)802.16 standards (e.g., 802.16e, 802.16m) (commonly known to the industry group as WiMAX (international microwave access interconnect)), and the IEEE 802.11 standard (commonly known to the industry group as WiFi).

In a 3GPP Radio Access Network (RAN) LTE system, a node may be a combination of multiple evolved universal terrestrial radio access network (E-UTRAN) node bs (also commonly denoted as evolved node bs, enhanced node B, eNodeB, or enbs) and multiple Radio Network Controllers (RNCs) that communicate with wireless devices called User Equipment (UE). Downlink (DL) transmissions may be communications from a node (e.g., eNodeB) to a wireless device (e.g., UE), and Uplink (UL) transmissions may be communications from the wireless device to the node.

In LTE, data may be transmitted from an eNodeB to a UE via a Physical Downlink Shared Channel (PDSCH). A Physical Uplink Control Channel (PUCCH) may be used to acknowledge that the data was received. The downlink and uplink channels or transmissions may use Time Division Duplexing (TDD) or Frequency Division Duplexing (FDD). Time Division Duplexing (TDD) is the application of Time Division Multiplexing (TDM) to separate downlink and uplink signals. In TDD, downlink and uplink signals may be transmitted on the same carrier frequency (i.e., a shared carrier frequency), where the downlink and uplink signals use different time intervals so that the downlink and uplink signals do not interfere with each other. TDM is a type of digital multiplexing in which two or more bit streams or signals (such as downlink or uplink) are transmitted apparently simultaneously as multiple sub-channels in one communication channel, but are transmitted on physically different resources. In Frequency Division Duplexing (FDD), uplink and downlink transmissions may operate using different frequency carriers (i.e., separate carrier frequencies for each transmission direction). In FDD, interference may be avoided because the downlink signal uses a different frequency carrier than the uplink signal.

Brief Description of Drawings

The features and advantages of the present disclosure will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which together illustrate, by way of example, the features of the present disclosure; and, in the drawings:

fig. 1 illustrates a schematic diagram of radio frame resources (e.g., a resource grid) including a legacy Physical Downlink Control Channel (PDCCH), according to an example;

fig. 2 illustrates a schematic diagram of various component carriers according to an example;

fig. 3 illustrates a block diagram of uplink radio frame resources (e.g., a resource grid) in accordance with an example;

fig. 4 illustrates a block diagram of a Physical Uplink Control Channel (PUCCH) region for Long Term Evolution (LTE), according to an example;

fig. 5 illustrates a block diagram of block interleaving mapping for Physical Uplink Control Channel (PUCCH) resources (e.g., hybrid automatic repeat request-acknowledgement (HARQ-ACK)) in Time Division Duplex (TDD), according to an example;

fig. 6 (i.e., table 4) illustrates a table of Physical Uplink Control Channel (PUCCH) resource values according to an example (i.e., 3GPP LTE standard release 11 Technical Specification (TS)36.213 table 9.2-2), the Physical Uplink Control Channel (PUCCH) resource values being based on an Acknowledgement (ACK)/negative ACK (ACK/NACK) resource indicator (ARI) for downlink semi-persistent scheduling (SPS);

fig. 7 (i.e., table 5) illustrates a table of Physical Uplink Control Channel (PUCCH) resource values that are hybrid automatic repeat request-acknowledgement (HARQ-ACK) resources for PUCCH (i.e., 3GPP LTE standard release 11 Technical Specification (TS)36.213 table 10.1.2.2.1-2), according to an example;

fig. 8 (i.e., table 6) illustrates a table for hybrid automatic repeat request-acknowledgement (HARQ-ACK) multiplexed transmissions for a-2 (i.e., 3GPP LTE standard release 11 Technical Specification (TS)36.213 table 10.1.3.2-1), according to an example;

fig. 9 (i.e., table 7) illustrates a table for hybrid automatic repeat request-acknowledgement (HARQ-ACK) multiplexed transmissions for a-3 (i.e., 3GPP LTE standard release 11 Technical Specification (TS)36.213 table 10.1.3.2-2), according to an example;

fig. 10 (i.e., table 8) illustrates a table for hybrid automatic repeat request-acknowledgement (HARQ-ACK) multiplexed transmissions for a-4 (i.e., 3GPP LTE standard release 11 Technical Specification (TS)36.213 table 10.1.3.2-3), according to an example;

fig. 11 (i.e., table 9) illustrates a table of Transport Block (TB) and serving cell to Physical Uplink Control Channel (PUCCH) format 1b hybrid automatic repeat request-acknowledgement (HARQ-ACK) channel selection HARQ-ACK (j) mapping according to an example (i.e., 3GPP LTE standard release 11 Technical Specification (TS)36.213 table 10.1.2.2.1-1);

fig. 12 (i.e., table 10) illustrates a table of sub-frame to Physical Uplink Control Channel (PUCCH) format 1b hybrid automatic repeat request-acknowledgement (HARQ-ACK) channel selected HARQ-ACK (j) mapping on each serving cell for Time Division Duplex (TDD) with bundling window size of M-2 (i.e., 3GPP LTE standard release 11 Technical Specification (TS)36.213 table 10.1.3.2-4), according to an example;

fig. 13 depicts a flow diagram of a method at a User Equipment (UE) for conditional hybrid automatic repeat request (HARQ) mapping for Carrier Aggregation (CA), according to an example;

fig. 14 depicts functions of computer circuitry of a User Equipment (UE) operable to provide conditional automatic repeat request-acknowledgement (HARQ-ACK) state mapping for Carrier Aggregation (CA), according to an example;

FIG. 15 illustrates a block diagram of a serving node, a coordinating node, and a wireless device (e.g., UE) in accordance with an example; and

fig. 16 illustrates a schematic diagram of a wireless device (e.g., UE) according to an example.

Reference will now be made to the exemplary embodiments illustrated, and specific language will be used herein to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended.

Detailed Description

Before the present invention is disclosed and described, it is to be understood that this invention is not limited to the particular structures, process steps, or materials disclosed herein but extends to equivalents thereof as would be recognized by those ordinarily skilled in the pertinent art. It is also to be understood that the terminology employed herein is for the purpose of describing particular examples only and is not intended to be limiting. Like reference symbols in the various drawings indicate like elements. The numerals provided in the flowcharts and processes are provided for clarity in explaining the various steps and operations and do not necessarily indicate a particular order or sequence.

Example embodiments

An initial overview of technical embodiments is provided below, and then specific technical embodiments are described further below. This initial summary is intended to aid the reader in understanding the technology more quickly, and is not intended to identify key features or essential features of the technology, nor is it intended to limit the scope of the claimed subject matter.

Data communication on the Physical Downlink Shared Channel (PDSCH) may be controlled via a control channel, referred to as the Physical Downlink Control Channel (PDCCH). The PDCCH may be used for Downlink (DL) and Uplink (UL) resource assignments, transmit power commands, and paging indicators. PDSCH scheduling grants may be assigned to specific wireless devices (e.g., UEs) for dedicated PDSCH resource allocations to transmit UE-specific traffic, or PDSCH scheduling grants may be assigned to all wireless devices in a cell for common PDSCH resource allocations to transmit broadcast control information such as system information or paging.

In an example, as shown in fig. 1, the PDCCH and PDSCH may represent elements of a radio frame structure transmitted on a Physical (PHY) layer in a downlink transmission using a general 3GPP Long Term Evolution (LTE) frame structure between a node (e.g., eNodeB) and a wireless device (e.g., UE).

Fig. 1 illustrates a downlink radio frame structure type 2. In this example, a radio frame 100 of a signal for transmitting data may be configured to have a duration Tf of 10 milliseconds (ms). Each radio frame may be segmented or partitioned into ten subframes 110i each 1 millisecond long. Each subframe may be further subdivided into two time slots 120a and 120b, each having a duration Tslot (T) of 0.5 milliseconds_{Time slot}). The first slot (#0)120a may include a conventional Physical Downlink Control Channel (PDCCH)160 and/or a Physical Downlink Shared Channel (PDSCH)166, and the second slot (#1)120b may include data transmitted using the PDSCH.

Each slot of a Component Carrier (CC) used by the node and the wireless device may include a plurality of Resource Blocks (RBs) 130a, 130b, 130i, 130m, and 130n based on the CC frequency bandwidth. A CC may have a carrier frequency and a center frequency with a certain bandwidth. Each subframe of the CC may include Downlink Control Information (DCI) found in the legacy PDCCH. When the legacy PDCCH is used, the legacy PDCCH in the control region may include one to three columns of the first OFDM symbol in each subframe RB. The remaining 11 to 13 OFDM symbols in the subframe (i.e., 14 OFDM symbols when the PDCCH is not used) may be allocated to the PDSCH for data (for short or normal cyclic prefix).

The control region may include a Physical Control Format Indicator Channel (PCFICH), a physical hybrid automatic repeat request (hybrid ARQ) indicator channel (PHICH), and a PDCCH. The control area has a flexible control design to avoid unnecessary overhead. The number of OFDM symbols in the control region used by the PDCCH may be determined by a control Channel Format Indicator (CFI) transmitted in a Physical Control Format Indicator Channel (PCFICH). The PCFICH may be located in the first OFDM symbol of each subframe. The PCFICH and PHICH may have a higher priority than the PDCCH, and thus the PCFICH and PHICH are scheduled before the PDCCH.

Each RB (physical RB or PRB)130i may include 12-15kHz subcarriers 136 (on the frequency axis) and 6 or 7 Orthogonal Frequency Division Multiplexing (OFDM) symbols 132 per slot. If a short or normal cyclic prefix is employed, the RB may use seven OFDM symbols. If an extended cyclic prefix is used, the RB may use six OFDM symbols. A resource block may be mapped to 84 Resource Elements (REs) 140i using a short or normal cyclic prefix, or a resource block may be mapped to 72 REs (not shown) using an extended cyclic prefix. The RE may be a unit of one OFDM symbol 142 by one subcarrier (i.e., 15kHz) 146.

In the case of Quadrature Phase Shift Keying (QPSK) modulation, each RE can transmit two bits 150a and 150b of information. Other types of modulation, such as 16 Quadrature Amplitude Modulation (QAM) or 64QAM, may be used to transmit a greater number of bits in each RE, or Binary Phase Shift Keying (BPSK) modulation may be used to transmit a smaller number of bits (a single bit) in each RE. The RB may be configured for downlink transmissions from the eNodeB to the UE, or the RB may be configured for uplink transmissions from the UE to the eNodeB.

Each wireless device may use at least one bandwidth. As shown in fig. 2, the bandwidth may be referred to as a signal bandwidth, a carrier bandwidth, or a Component Carrier (CC) bandwidth. For example, the LTE CC bandwidth may include: 1.4MHz 310, 3MHz 312, 5MHz314, 10MHz 316, 15MHz 318, and 20MHz 320. The 1.4MHz CC may include 6 RBs including 72 subcarriers. The 3MHz CC may include 15 RBs including 180 subcarriers. The 5MHz CC may include 25 RBs including 300 subcarriers. The 10MHz CC may include 50 RBs including 600 subcarriers. The 15MHz CC may include 75 RBs including 900 subcarriers. The 20MHz CC may include 100 RBs including 1200 subcarriers.

For each UE, a CC may be defined as a primary cell (PCell). Different UEs may not necessarily use the same CC as their PCell. The PCell may be considered as an anchor carrier for the UE, and thus the PCell may be used to control signaling functions such as radio link failure monitoring, hybrid automatic repeat request-acknowledgement (HARQ-ACK), and Physical Uplink Control Channel (PUCCH) Resource Allocation (RA). If more than one CC is configured for a UE, the additional CCs may be denoted as secondary cells (scells) of the UE.

Data transmitted on the PDCCH may be referred to as Downlink Control Information (DCI). Multiple wireless devices may be scheduled in one subframe of a radio frame. Accordingly, multiple DCI messages may be transmitted using multiple PDCCHs. DCI information in a PDCCH may be transmitted using one or more Control Channel Elements (CCEs). A CCE may consist of a set of Resource Element Groups (REGs). A legacy CCE may include up to nine REGs. Each legacy REG may consist of four Resource Elements (REs). When orthogonal modulation is used, each resource element may include two information bits. Thus, a legacy CCE may include up to 72 information bits. Where more than 72 information bits are needed to transmit a DCI message, multiple CCEs may be employed. The use of multiple CCEs may be referred to as an aggregation level. In an example, the aggregation level may be defined as 1, 2, 4, or 8 consecutive CCEs allocated to one legacy PDCCH.

Legacy PDCCH may impose limitations on developments made in other areas of wireless communication. For example, the mapping of CCEs to subframes in an OFDM symbol is typically spread over the control region to provide frequency diversity. However, no beamforming diversity is possible for the current mapping procedure of PDCCH. Furthermore, the capacity of the legacy PDCCH may not be sufficient for advanced control signaling.

To overcome the limitation of the legacy PDCCH, the advanced PDCCH (epdcch) may use the entire PRB or REs in a PRB pair (where a PRB pair may be two adjacent PRBs of a subframe using the same subcarrier) instead of using only the first to third columns of OFDM symbols in the first slot PRB of the subframe as in the legacy PDCCH. Thus, EPDCCH may be configured with increased capacity to allow for development in cellular network design and to minimize currently known challenges and limitations.

Unlike the legacy PDCCH, EPDCCH may be mapped to the same REs or regions in a PRB as PDSCH, but in a different PRB. In an example, PDSCH and EPDCCH may not be multiplexed within the same PRB (or same PRB pair). Thus, if one PRB (or one PRB pair) contains EPDCCH, unused REs in the PRB (or PRB pair) may be left blank since REs may not be used for the PDSCH.

For a Long Term Evolution (LTE) Time Division Duplex (TDD) system, two types of downlink control channels (e.g., PDCCH and EPDCCH) may coexist within a particular bundling window. PUCCH resource allocation methods may be defined when the bundling window uses both PDCCH and EPDCCH.

Referring back to fig. 2, as shown in fig. 3, component carriers may be used to communicate channel information via a radio frame structure transmitted on a Physical (PHY) layer in an uplink transmission between a node (e.g., eNodeB) and a wireless device (e.g., UE) using a general Long Term Evolution (LTE) frame structure. Although an LTE frame structure is illustrated, a frame structure for another type of communication standard using SC-FDMA or OFDMA may also be used.

Fig. 3 illustrates an uplink radio frame structure. As shown in FIG. 1, a similar structure may be used for using OFDMAA downlink radio frame structure. In the example shown in fig. 3, a radio frame 100 for transmitting signals of control information or data may be configured to have a duration T of 10 milliseconds (ms)_f. Each radio frame may be segmented or partitioned into ten subframes 110i each 1 millisecond long. Each subframe may be further subdivided into two time slots 120a and 120b, each having a duration T of 0.5 milliseconds_slot(T_{Time slot}). Each slot of a Component Carrier (CC) used by wireless devices and nodes may include a plurality of Resource Blocks (RBs) 330a, 330b, 330i, 330m, and 330n based on the CC frequency bandwidth. Each RB (physical RB or PRB)330i may include 12-15kHz subcarriers 336 (on the frequency axis) and 6 or 7 SC-FDMA symbols 332 (on the time axis) per subcarrier. If a short or normal cyclic prefix is employed, the RB may use seven SC-FDMA symbols. If an extended cyclic prefix is used, the RB may use six SC-FDMA symbols. A resource block may be mapped to 84 Resource Elements (REs) 140i using a short or normal cyclic prefix, or a resource block may be mapped to 72 REs (not shown) using an extended cyclic prefix. The REs may be units of one SC-FDMA symbol 342 multiplied by one subcarrier (i.e., 15kHz) 146. In the case of Quadrature Phase Shift Keying (QPSK) modulation, each RE can transmit two bits 150a and 150b of information. Other types of modulation, such as 16 Quadrature Amplitude Modulation (QAM) or 64QAM, may be used to transmit a greater number of bits in each RE, or Binary Phase Shift Keying (BPSK) modulation may be used to transmit a smaller number of bits (a single bit) in each RE. The RB may be configured for uplink transmissions from the wireless device to the node.

The uplink signals or channels may include data on a Physical Uplink Shared Channel (PUSCH) and data on a Physical Uplink Control Channel (PUCCH). In LTE, an uplink physical channel transmitting Uplink Control Information (UCI) may include a Channel State Information (CSI) report, a hybrid automatic repeat request (HARQ) acknowledgement/negative acknowledgement (ACK/NACK), and an uplink Scheduling Request (SR).

A wireless device (e.g., a UE) may provide HARQ-ACK feedback for the PDSCH using the PUCCH. As shown in table 1 for LTE, the PUCCH may support multiple formats (i.e., PUCCH formats) with various Modulation and Coding Schemes (MCSs). Information similar to table 1 may be shown in 3GPP LTE standard release 11 (e.g., V11.2.0(2013-02)) Technical Specification (TS)36.211 table 5.4-1. For example, PUCCH format 1b may be used to transmit two bits of HARQ-ACK, which may be used for carrier aggregation. References to tables (e.g., mapping tables) in 3GPP LTE release 11 can also be found in 3GPP LTE releases 8, 9, and 10.

TABLE 1

Legacy LTE TDD can support asymmetric UL-DL allocations by providing uplink-downlink configurations of seven different semi-static configurations. Table 2 illustrates seven UL-DL configurations used in LTE, where "D" denotes a downlink subframe, "S" denotes a dedicated subframe, and "U" denotes an uplink subframe. In an example, the dedicated subframe may be operated as or treated as a downlink subframe. Similar information to table 2 is shown in 3GPP LTE TS 36.211 table 4.2-2.

TABLE 2

As shown in table 2, UL-DL configuration 0 may include 6 uplink subframes of subframes 2, 3, 4, 7, 8, and 9 and 4 downlink and special subframes of subframes 0, 1, 5, and 6; and UL-DL configuration 5 may include one uplink subframe in subframe 2 and 9 downlink and special subframes in subframes 0, 1, and 3-9. Each uplink subframe n may be associated with one downlink subframe based on an uplink-downlink configurationIn this case, each uplink subframe n may have a downlink association set index K ∈ { K }₀，k₁，...k_M-1Where M is defined as the number of elements in the set K, as shown in table 3. Similar information to table 3 may be shown in 3GPP LTE TS 36.213 table 10.1.3.1-1.

TABLE 3

Table 3 shows an example of downlink subframe bundling in an uplink subframe that handles ACK/NACK feedback for specific downlink subframe(s). For example, in uplink-downlink configuration 4, uplink subframe 2 (subframe n) is transmitted for more than uplink subframe 2 (i.e., downlink and special subframes {0, 4, 5, 1} (or downlink and special subframe n-k)_m) Early as {12, 8, 7, 11} sub-frame (sub-frame k)_m) And special subframe, M equals 4. Uplink subframe 3 (subframe n) transmission is for more than uplink subframe 3 (i.e., downlink and special subframes {7, 8, 9, 6} (or downlink and special subframe n-k)_m) Early as {6, 5, 5, 7} sub-frame (sub-frame k)_m) M equals 4. For uplink-downlink configuration 5 uplink subframe 2, M equals 9. For uplink-downlink configuration 0, uplink subframe 2, M equals 1, and uplink subframe 3, M equals 0. One uplink subframe may be responsible for ACK/NACK feedback for one or more downlink subframes according to an uplink-downlink configuration. In certain cases, an even distribution between uplink subframe responsibilities may be desired to reduce the cases where one uplink subframe is responsible for ACK/NACK feedback for a large number of downlink and special subframes.

As a basic requirement in some examples, a cell of a network may change multiple UL-dl (tdd) configurations synchronously to avoid interference. As shown in table 2, the legacy LTE TDD configuration set may provide DL subframe allocation in a range between 40% and 90%. UL and DL subframe allocations within a radio frame may be reconfigured by system information broadcast signaling (e.g., system information block SIB). Thus, the UL-DL allocation, once configured, is expected to change semi-statically.

A property of TDD is that multiple UL and DL subframes may be different as shown in table 2, and the number of DL subframes is usually more than the number of UL subframes for one radio frame. In configurations using more DL subframes than UL subframes, multiple DL subframes may be associated with a single UL subframe to transmit respective control signals. Configuration specific HARQ-ACK timing relationships may be defined (e.g., 3GPP LTE standard release 11 (e.g., V11.2.0(2013-02)) TS 36.213 table 10.1.3.1-1 or table 3). If a UE is scheduled in multiple DL subframes, which may be one UL subframe, the UE may transmit multiple ACK/NACK (ACK/NACK) bits in the UL subframe. Multiple DL subframes with HARQ-ACK feedback on a single UL subframe may include one bundling window.

Fig. 4 illustrates PUCCH resource allocation and use with legacy PDCCH for TDD. Only the first slot is expanded or described in detail since the second slot may have symmetry in slot-level hopping for PUCCH. PRBs of PUCCH format 2/2a/2b may be located from band-edge (band-edge) PRBs toThis may be configured by higher layer signaling, e.g., Radio Resource Control (RRC) signaling. If there are mixed PRBs for the PUCCH format 2/2a/2b and PUCCH format 1/1a/1b, the mixed PRBs may be formed byConfiguration, where one PUB may be used for the mixed PRB. After the hybrid PRB, the PRB of the PUCCH format 1/1a/1b semi-statically configured through RRC signaling may be located. FromInitially, there may be and PUCCH formats 1a/1b according to dynamic resource allocation based on lowest CCE index may be locatedA PRB. PUSCH may also be transmitted in a dynamic PUCCH resource region according to a scheduling policy. Any PRB of PUCCH format 3 may be located through RRC signaling. In another example, PRBs of PUCCH format 3 may be transmitted in-band like other PUCCH formats.

For example, TDD HARQ-ACK bundling or TDD HARQ-ACK multiplexing for one configured serving cell and subframe n with M ═ 1, where M is the number of elements in set K defined in table 3, for antenna ports p mapped to for PUCCH formats 1a/1bThe UE may use PUCCH resourcesFor transmitting HARQ-ACK in subframe n if PDSCH transmission is indicated by detection of the corresponding PDCCH or the PDCCH indicates downlink semi-persistent scheduling (SPS) release within subframe(s) n-K, where K ∈ K and K (defined in Table 3) are a set { K) of M elements depending on subframe n and UL-DL configuration (defined in Table 2)₀，k₁，...k_M-1Then the UE may first choose to let N be selected from {0, 1, 2, 3}_c≤n_CCE＜N_c+1And may be an antenna port p₀Use ofWhereinConfigured by higher layers (e.g. RCC signaling),n_CCEis for sub-frame n-k_mNumber of the first CCE of the transmission of the corresponding PDCCH and the corresponding m, where k_mIs the minimum value in the set K to make the UE in subframe n-K_mThe PDCCH is detected. When dual antenna port transmission is configured for PUCCH format 1a/1b, antenna port p is targeted₁The PUCCH resources of the HARQ-ACK bundling can be determined byThe following is given:

for example, for TDD, PUCCH resources of each DL subframe may be reserved exclusively as much as possible, and the number of reserved resources of each DL subframe may be similar to each other by applying block-interleaved mapping, as shown in fig. 5. By reserving PUCCH resources for each DL subframe, PUSCH resources may be efficiently scheduled for DL subframes within the bundling window. The PUCCH resource for HARQ-ACK in TDD can also be determined by a function of the lowest CCE index of the scheduling PDCCH.

As for EPDCCH, EPDCCH may be monitored by higher layer signaling configuration subframes. Thus, within a particular bundling window, two types of downlink control channels for PDCCH and EPDCCH may coexist. For example, as shown in fig. 4, according to higher layer configuration, for a UE assuming M-4, subframes M-0 and 2 may be used for PDCCH, and M-1 and 3 may be used for EPDCCH. As a result, when the bundling window uses both PDCCH and EPDCCH, a PUCCH resource allocation method providing PDCCH and EPDCCH can be defined.

For example, two types of DL control channels (i.e., PDCCH and EPDCCH) may coexist within the bundling window. A mechanism may be used to handle PUCCH resource allocation on a hybrid DL subframe, with PDCCH and EPDCCH within a bundling window for TDD. In one configuration, the UE may follow a resource allocation method for the resulting DL subframe for the PUCCH resource (e.g., either PDCCH or EPDCCH) actually transmitted. In another configuration, the UE may follow legacy PDCCH rules (e.g., base resource allocation on the transmitted PUCCH resource (i.e., method a)). In another configuration, the UE may follow the EPDCCH rule (e.g., base resource allocation on the transmitted EPUCCH resources (i.e., method B)).

As used herein, a bundling window in which PDCCH and EPDCCH of a UE can coexist is referred to as a "hybrid bundling window" unless stated otherwise. A method for dynamic PUCCH resource allocation in a hybrid bundling window for TDD is disclosed.

May be defined and transmitted for TDDA dynamic PUCCH resource allocation method (e.g., method a) corresponding to a conventional PDCCH (e.g., sometimes referred to as PDCCH). A dynamic PUCCH resource allocation method (e.g., method B) corresponding to EPDCCH may also be defined for TDD. For example, PUCCH resource allocation between method a and method B may be performed by actually used PUCCH resources derived from DL subframes (e.g.,or) To be determined.

For example, if the actually used PUCCH resource is derived from a DL subframe configured for EPDCCH, method B may be used as PUCCH resource allocation. Method a may be used as PUCCH resource allocation if the actual PUCCH resource is derived from DL subframes that are not configured for EPDCCH (i.e., configured for PDCCH). For example, on HARQ-ACK multiplexing (i.e., PUCCH format 1b with channel selection), if the UE uses PUCCH resourcesTo transmit HARQ-ACK feedback and PUCCH resources are derived from m ═ j within the bundling window, a PUCCH resource allocation method may be applied between methods a and B based on whether DL subframe m used for PUCCH resource derivation is configured for PDCCH or EPDCCH.

As for dynamic PUCCH resource allocation for TDD in a single configured cell, PUCCH format 1a/1b transmission and PUCCH format 1b with channel selection (i.e., HARQ-ACK multiplexing) is supported by n_CCE(e.g., lowest CCE index of PDCCH) or n_ECCE(e.g., lowest ECCE index of EPDCCH) determined implicit resource allocation. For both PUCCH formats 1a/1b and PUCCH format 1b with channel selection, the number of PUCCH resources actually transmitted may be one CCE. The PUCCH resources used may be determined either by the corresponding DL subframe or by DL Downlink Assignment Index (DAI) values within the bundling window. The Downlink Assignment Index (DAI) may be signaledA field in a downlink resource grant known to a wireless device (e.g., a UE) indicates how many subframes in a previous time window contain transmissions to the wireless device. The DAI may be applied in a Time Domain Duplex (TDD) mode and may cause the wireless device to determine whether the wireless device has received all downlink subframes or transport blocks for which a combined ACK/NACK is transmitted.

In an example, a PUCCH resource allocation formula for TDD with EPDCCH may be expressed asWherein n is_ECCEMay be the lowest ECCE index number and Value may consist of various parameters. As an example of this, it is possible to provide,where ACK/NACK resource indicator (ARI) is an offset value (e.g., may be an integer value) that may be derived from DCI in EPDCCH, AP is an antenna port (0...., 3), m is based on the parameters of table 3, andis a UE-specific starting offset value for EPDCCH set k. In another example, an ACK/NACK resource offset value (ARO) may replace the ARI.

In one configuration, TDD HARQ-ACK bundling or TDD HART-ACK multiplexing for one configured serving cell and subframe n where M is 1, where M is the number of elements in set K defined in table 3, for antenna port p mapped to for PUCCH format 1a/1bThe UE may use PUCCH resourcesFor transmission of HARQ-ACK in subframe n.

If there is a PDSCH transmission indicated by detection of the corresponding PDCCH/EPDCCH, or if there is a downlink in subframe(s) n-k indicatedPDCCH/EPDCCH for SPS Release, where K ∈ K and K (defined in Table 3) are a set of M elements { K ] depending on subframe n and UL-DL configuration₀，k₁，...k_M-1And if subframe n-k_mNot configured for EPDCCH, the UE may first choose to have N selected from {0, 1, 2, 3}, etc_c≤n_CCE＜N_c+1And may be an antenna port p₀Use ofWhereinIs configured by the higher layers and,n_CCEis for sub-frame n-k_mNumber of the first CCE of the transmission of the corresponding PDCCH and the corresponding m, where k_mIs the minimum value in the set K to make the UE in subframe n-K_mThe PDCCH is detected (i.e., the last DL subframe in which the PDCCH was detected within the bundling window). When dual antenna port transmission is configured for PUCCH format 1a/1b, antenna port p is targeted₁The PUCCH resource for HARQ-ACK bundling may be given by:

if there is a PDSCH transmission indicated by detection of the corresponding PDCCH/EPDCCH, or if there is a PDCCH/EPDCCH indicating downlink SPS release within subframe(s) n-K, where K ∈ K and K (defined in Table 3) are a set { K) of M elements depending on subframe n and UL-DL configuration₀，k₁，...k_M-1And if subframe n-k_mConfigured for EPDCCH, the UE may be an antenna port p₀Use ofAnd n is_ECCEIs for sub-frame n-k_mMiddle EPDCCH setCorresponding EPDCCH and corresponding number of the first ECCE of the transmission of m, where k_mIs the minimum value in the set K to make the UE in subframe n-K_m(i.e., the last DL subframe in which EPDCCH was detected within the bundling window) EPDCCH sets are detectedEPDCCH of (1). When dual antenna port transmission is configured for PUCCH format 1a/1b, antenna port p is targeted₁The PUCCH resource for HARQ-ACK bundling may be given by:

if there is only PDSCH transmission where there is no corresponding PDCCH/EPDCCH detected within subframe(s) n-K, where K ∈ K and K are defined in table 3, the UE may use PUCCH format 1a/1b and has a value ofPUCCH resources ofDetermined from the higher layer configuration and table 4 (i.e., fig. 6). For a UE configured for dual antenna port transmission of PUCCH format 1a/1b and HARQ-ACK bundling, the PUCCH resource values in Table 4 map to two PUCCH resources, with the first PUCCH resourceFor antenna port p₀And a second PUCCH resourceFor antenna port p₁Otherwise, the PUCCH resource value is mapped to p for the antenna port₀Single PUCCH resource of

Thus, for HARQ-ACK bundling or HARQ-ACK multiplexing with M ═ 1 and no Carrier Aggregation (CA), the PUCCH resource used may be derived from the last DL subframe within the bundling window, depending on whether the DL subframe is configured by PDCCH or EPDCCH.

In another configuration, for a TDD HARQ-ACK multiplexing and subframe n with M > 1, where M is the number of elements in the set K defined in Table 3, and one configured serving cell, will beDenoted as from sub-frame n-k_iThe obtained PUCCH resource is represented by HARQ-ACK (i) from sub-frame n-k_iACK/negative ACK/Discontinuous Transmission (DTX) response of (i.e., ACK/NACK/DTX), where k is_i∈ K (defined in Table 3) and 0. ltoreq. i.ltoreq.M-1.

For PDSCH transmissions indicated by detection of a corresponding PDCCH/EPDCCH, or representing a subframe n-k_iPDCCH/EPDCCH for intra-downlink SPS release, where k_i∈ K, and if subframe n-K_iNot configured for EPDCCH, PUCCH resources may be represented asWherein c is selected from {0, 1, 2, 3} such that N_c≤n_CCE，i＜N_c+1，n_CCE，iIs used in sub-frame n-k_iThe number of the first CCE used by the corresponding PDCCH is transmitted,configured by higher layers.

For PDSCH transmissions indicated by detection of a corresponding PDCCH/EPDCCH, or representing a subframe n-k_iPDCCH/EPDCCH for intra-downlink SPS release, where k_i∈ K, and if subframe n-K_iConfigured for EPDCCH, the PUCCH resource isWherein n is_ECCE，iIs used in sub-frame n-k_iMidamble EPDCCH setThe number of the first ECCE used by the corresponding EPDCCH.

For sub-frame n-k_iPDSCH transmission of the corresponding PDCCH/EPDCCH is not detected,may be determined based on the higher layer configuration and table 4 (i.e., fig. 6).

In another configuration, for TDD HARQ-ACK multiplexing with M ≦ 2 PUCCH format 1b with channel selection and two configured serving cells and subframe n, where M is the number of elements in set K defined in Table 3, the UE may use PUCCH format 1b in subframe n from A PUCCH resources according to Table 6 (i.e., FIG. 8), Table 7 (i.e., FIG. 9), and Table 8 (i.e., FIG. 10)(where j is 0. ltoreq. A-1 and A ∈ {2, 3, 4})The upper transmission b (0) b (1) (e.g., constellation bits). For subframe n where M ═ 1, HARQ-ACK (j) denotes an ACK/NACK/DTX response for the transport block or SPS release PDCCH associated with the serving cell, and where the transport block and serving cell of HARQ-ACK (j) and a PUCCH resources are given by table 9 (i.e. fig. 11). For subframe n of M-2, HARQ-ACK (j) denotes ACK/NACK/DTX response for PDSCH transmission or SPS release PDCCH within the subframe(s) given by set K on each serving cell, where the subframe on each serving cell and a PUCCH resources for HARQ-ACK (j) are given by table 10 (i.e. fig. 12). The UE may determine a PUCCH resources associated with HARQ-ack (j) in table 9 (i.e., fig. 11) for M ═ 1 and in table 10 (i.e., fig. 12) for M ═ 2 according to the followingWherein j is more than or equal to 0 and less than or equal to A-1:

for a subframe n-k_mPDSCH transmission indicated by detection of corresponding PDCCH/EPDCCH, where k is on the primary cell_m∈ K, or subframe n-K for PDCCH/EPDCCH_mIn which k is on the primary cell_m∈ K, and if subframe n-K_mNot configured for EPDCCH, PUCCH resources may be represented by:wherein c is selected from {0, 1, 2, 3} such that N_c≤n_CCE，m＜N_c+1，WhereinAutonomous cell determination and PUCCH resources for subframe n with M ═ 1 and transmission modes supporting up to two transport blocks on the serving cell where the corresponding PDSCH transmission occursRepresented by the formula:wherein n is_CCE，mIs the number of the first CCE used to transmit the corresponding DCI assignment,configured by higher layers.

For a subframe n-k_mPDSCH transmission indicated by detection of corresponding PDCCH/EPDCCH, where k is on the primary cell_m∈ K, or subframe n-K for PDCCH/EPDCCH_mIn which k is on the primary cell_m∈ K, and if subframe n-K_mIs configured forEPDCCH, PUCCH resources may be selected fromMeans, and for subframe n with M ═ 1 and a transmission mode supporting up to two transport blocks on the serving cell where the corresponding PDSCH transmission occurs, PUCCH resourcesGiven by:wherein n is_ECCE，mIs for transmission aggregated by EPDCCHThe number of the first CCE assigned by the corresponding DCI made by EPDCCH of (a).

For PDSCH transmission on the primary cell when no corresponding PDCCH/EPDCCH is detected within subframe(s) n-K, where K ∈ K,may be determined based on the higher layer configuration and table 4 (i.e., fig. 6).

In another configuration, for TDD HARQ-ACK multiplexing with PUCCH format 1b with channel selection, and subframe n with M > 2 and two configured serving cells, where M is the number of elements in set K defined in table 3, will beExpressed as PUCH resources resulting from transmission in M DL subframes associated with UL subframe n, where 0 ≦ i ≦ 3.Andassociated with PDSCH transmission(s) or PDCCH indicating downlink SPS release on the primary cell,andassociated with PDSCH transmission(s) on the secondary cell.

For the primary cell, if there is PDSCH transmission on the primary cell and no corresponding PDCCH/EPDCCH is detected in subframe(s) n-K, where K ∈ K, then it may be determined from the higher layer configuration and table 5 (i.e., see fig. 7)The value of (c).

If there is a PDSCH transmission on the primary cell and no corresponding PDCCH/EPDCCH is detected in subframe(s) n-K, where K ∈ K, then for the primary cell transmitted by subframe n-K_mPDSCH transmission on the primary cell indicated by detection of the corresponding PDCCH/EPDCCH, where k_m∈ K, and the DAI value in PDCCH/EPDCCH is equal to "1", or n-K for indicating subframe_mPDCCH of downlink SPS Release in (1), where k_m∈ K, and the DAI value in PDCCH/EPDCCH is equal to "1", and if subframe n-K_mNot configured for EPDCCH, PUCCH resources may be represented by:wherein c is selected from {0, 1, 2, 3} such that N_c≤n_CCE，m＜N_c+1，Wherein n is_CCE，mIs used in sub-frame n-k_mMedium is EPDCCH setThe number of the first CCE transmitting the corresponding PDCCH,configured by higher layers.

If there is a PDSCH transmission on the primary cell and no corresponding PDCCH/EPDCCH is detected in subframe(s) n-K, where K ∈ K, then for the primary cell transmitted by subframe n-K_mPDSCH transmission on the primary cell indicated by detection of the corresponding PDCCH/EPDCCH, where k_m∈ K, and the DAI value in PDCCH/EPDCCH is equal to "1", or n-K for indicating subframe_mPDCCH of downlink SPS Release in (1), where k_m∈ K, and the DAI value in PDCCH/EPDCCH is equal to "1", and if subframe n-K_mConfigured for EPDCCH, the PUCCH resources may be represented by:wherein n is_ECCE，mIs used in sub-frame n-k_mMedium is EPDCCH setThe number of the first ECCE of the corresponding EPDCCH is transmitted.

If there is a PDSCH transmission on the primary cell and the corresponding PDCCH/EPDCCH is not detected within subframe(s) n-K, where K ∈ K, then HARQ-ACK (0) may be an ACK/NACK/DTX response for PDSCH transmissions without the corresponding PDCCH/EPDCCH. For j ≦ 0 ≦ M-1, the HARQ-ACK (j) may be a corresponding ACK/NACK/DTX response if a PDSCH transmission is received with a corresponding PDCCH/EPDCCH and a DAI value in the PDCCH/EPDCCH equal to "j" or a PDCCH/EPDCCH indicating a downlink SPS release and a DAI value in the PDCCH/EPDCCH equal to "j"; otherwise, HARQ-ack (j) may be set to DTX.

Otherwise (e.g., if there is a PDSCH transmission on the primary cell and the corresponding PDCCH/EPDCCH is detected in subframe(s) n-K, where K ∈ K), for the subframe n-K_mPDSCH transmission on the primary cell indicated by detection of the corresponding PDCCH/EPDCCH, where k_m∈ K, and the DAI value in PDCCH/EPDCCH is equal to "1" or "2", or for indicating subframe n-K_mPDCCH/EPDCCH for Downlink SPS Release in (1), wherein k_m∈ K, and the DAI value in PDCCH/EPDCCH is equal to "1" or "2 ", and if subframe n-k_mNot configured for EPDCCH, PUCCH resources may be represented by:wherein c is selected from {0, 1, 2, 3} such that N_c≤n_CCE，m＜N_c+1，Wherein n is_CCE，mIs used in sub-frame n-k_mThe number of the first CCE in which the corresponding PDCCH is transmitted,configured by higher layers, i is 0 for a corresponding PDCCH with DAI value equal to "1", and i is 1 for a corresponding PDCCH with DAI value equal to "2".

Otherwise (e.g., if there is a PDSCH transmission on the primary cell and the corresponding PDCCH/EPDCCH is detected in subframe(s) n-K, where K ∈ K), for the subframe n-K_mPDSCH transmission on the primary cell indicated by detection of the corresponding PDCCH/EPDCCH, where k_m∈ K, and the DAI value in PDCCH/EPDCCH is equal to "1" or "2", or for indicating subframe n-K_mPDCCH/EPDCCH for Downlink SPS Release in (1), wherein k_m∈ K, and the DAI value in PDCCH/EPDCCH is equal to "1" or "2", and if subframe n-K_mConfigured for EPDCCH, the PUCCH resources may be represented by:wherein n is_CCE，mIs used in sub-frame n-k_mMedium is EPDCCH setNumber of first ECCE transmitting corresponding EPDCCH, i ═ 0 for corresponding EPDCCH with DAI value equal to "1", and EPDCCH set with DAI value equal to "2A corresponding PDCCH is transmitted to the mobile station,i＝1。

otherwise (if there is a PDSCH transmission on the primary cell and the corresponding PDCCH/EPDCCH is detected within subframe(s) n-K, where K is e.k), for 0 ≦ j ≦ M-1, HARQ-ACK (j) is the corresponding ACK/NACK/DTX response if a PDSCH transmission is received with the corresponding PDCCH/EPDCCH and the DAI value in the PDCCH/EPDCCH equals "j + 1", or a PDCCH/EPDCCH indicating a downlink SPS release and the DAI value in the PDCCH/EPDCCH equals "j + 1"; otherwise, HARQ-ack (j) may be set to DTX.

The secondary cell may not transmit EPDCCH, so PUCCH resource allocation may use legacy PDCCH rules for the secondary cell.

In another example, if only PDCCH is within the bundling window, a conventional PUCCH resource allocation method may be used. If only EPDCCH is within the bundling window, a PUCCH resource allocation method associated with EPDCCH may be used. If at least one EPDCCH is within the bundling window, either conventional PUCCH resource allocation methods or PUCCH resource allocations associated with the EPDCCH may be used, as previously described.

The same principles described for PUCCH format 1a/1b or PUCCH format 1b with channel selection may be applied when PUCCH format 3 is configured (e.g., primary cell backup case).

As shown in the flowchart in fig. 13, another example provides a method 500 of conditional Time Division Duplex (TDD) Physical Uplink Control Channel (PUCCH) resource allocation at a User Equipment (UE) for hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission in subframe n. The method may be performed as instructions on a machine, computer circuitry, or a processor of the UE, wherein the instructions are included on at least one computer-readable medium or one non-transitory machine-readable storage medium. The method includes an operation of recognizing that a downlink control channel type received in a previous designated subframe occurs in time before subframe n is a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH), as in block 510. Then is an operation of determining PUCCH resources for HARQ-ACK transmission using a lowest Control Channel Element (CCE) index of a Physical Downlink Control Channel (PDCCH) when the downlink control channel type is PDCCH, as in block 520. The next operation of the method, as in block 530, may be: when the downlink control channel type is EPDCCH, a PUCCH resource for HARQ-ACK transmission is determined using a lowest enhanced cce (ecce) index of the EPDCCH.

In an example, the previous specified subframe may comprise subframe n-K, where K ∈ K, and where a downlink association set index K is defined in table 10.1.3.1-1 (e.g., table 3) in third generation partnership project (3GPP) Long Term Evolution (LTE) standard release 11 Technical Specification (TS)36.213, and K may comprise a set of M elements { K [/K ] depending on subframe n and uplink/downlink (UL/DL) configuration₀，k₁，...k_M-1}。

In another example, the operation of using the lowest enhanced cce (ecce) index of the EPDCCH to determine the PUCCH resource for subframe n-k may be further configured to: use byThe indicated parameter Value determines the PUCCH resources, where the Acknowledgement (ACK)/negative ACK (ACK/NACK) resource offset (ARO) is an integer offset Value derived from Downlink Control Information (DCI) in the EPDCCH, the Antenna Port (AP) is the parameter (0., 3),is for EPDCCH setM is an integer, where k is a starting offset value specific to the UE of (1)_mIs the minimum value in the set K, such that the UE is in subframe n-K_mDetection for EPDCCH setEPDCCH of (1).

For a configured serving cell and subframe n, makeIndexing n with the lowest CCE of PDCCH_CCETo determine PUCCH resources for HARQ-ACK transmissionThe operations of (1) may further include: selecting c value from {0, 1, 2, 3} to make N_c≤n_CCE＜N_c+1And is an antenna port p₀Use byPUCCH resource representedAnd is an antenna port p₁Use byPUCCH resource representedWherein n is_CCEIs for sub-frame n-k_mFirst CCE index number of transmission of corresponding PDCCH and corresponding m, where k_mIs the minimum value in the set K to make the UE in subframe n-K_mIn the detection of the PDCCH,so as to makeIn terms of the downlink bandwidth configuration in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is the starting PUCCH channel index of the PUCCH region in the uplink subframe and is configured by the higher layer of each UE. Antenna port p₁May be used when two antenna port transmissions are configured. Lowest ECCE index n using EPDCCH_ECCETo determine PUCCH resources for HARQ-ACK transmissionThe operations of (1) may further include: is an antenna port p₀Use byPUCCH resource representedAnd is an antenna port p₁Use byPUCCH resource representedWhere Value is a parameter, n_ECCEIs for sub-frame n-k_mMiddle EPDCCH setCorresponding EPDCCH and corresponding number of the first ECCE of the transmission of m, where k_mIs the minimum value in the set K to make the UE in subframe n-K_mDetecting EPDCCH setEPDCCH of (1). Antenna port p₁May be used when two antenna port transmissions are configured.

For a configured serving cell and subframe n with M > 1, where 0 ≦ i ≦ M-1, the lowest CCE index n of PDCCH is used_CCE，iTo determine PUCCH resources for HARQ-ACK transmissionCan be represented by the following formula:wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，i＜N_c+1，n_CCE，iIs used in sub-frame n-k_iA first CCE index number used for transmitting a corresponding PDCCH,so as to makeIn terms of the downlink bandwidth configuration in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is the starting PUCCH channel index of the PUCCH region in the uplink subframe and is configured by the higher layer of each UE. Lowest ECCE index n using EPDCCH_ECCE，iTo determine PUCCH resources for HARQ-ACK transmissionCan be represented by the following formula:where Value is a parameter, n_ECCE，iIs used in sub-frame n-k_iMidamble EPDCCH setThe number of the first ECCE used by the corresponding EPDCCH.

For at least two configured serving cells with M ≦ 2 and subframe n, where k is on the primary cell_m∈ K, j is more than or equal to 0 and less than or equal to A-1 and A ∈ {2, 3, 4}, the lowest CCE index n of PDCCH is used_CCE，mTo determine PUCCH resources for HARQ-ACK transmissionCan be represented by the following formula:andwherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，m＜N_c+1，n_CCE，mIs used in sub-frame n-k_iA first CCE index number used for transmitting a corresponding PDCCH,so as to makeThe downlink bandwidth configuration from the primary cell in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is a starting PUCCH channel index of a PUCCH region in an uplink subframe and is configured by a higher layer of each UE,a transmission mode for subframe n and up to two transport blocks is supported on a serving cell where a corresponding Physical Downlink Shared Channel (PDSCH) transmission occurs. Lowest ECCE index n using EPDCCH_ECCE，mTo determine PUCCH resources for HARQ-ACK transmissionCan be represented by the following formula:andwhere Value is a parameter, n_ECCE，mIs used in sub-frame n-k_mIn-transmission is aggregated by EPDCCHThe corresponding DCI by the EPDCCH of (a) assigns the number of the first ECCE used,a transmission mode for subframe n and up to two transport blocks on the serving cell where the corresponding PDSCH transmission occurs is supported.

For at least two configured serving cells with M > 2 and subframe n, where K ∈ K, on the primary cell_m∈ K, using the lowest CCE index n of PDCCH_CCE，mTo determine PUCCH resources for HARQ-ACK transmissionCan be represented by the following formula:wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，m＜N_c+1，n_CCE，mIs used in sub-frame n-k_mA first CCE index number used for transmitting a corresponding PDCCH,so as to makeThe downlink bandwidth configuration from the primary cell in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is a starting PUCCH channel index of a PUCCH region in an uplink subframe and is indexed by perThe higher layers of the individual UEs. Lowest ECCE index n using EPDCCH_ECCE，mTo determine PUCCH resources for HARQ-ACK transmissionCan be represented by the following formula:where Value is a parameter, n_ECCE，mIs used in sub-frame n-k_mMidamble EPDCCH setThe number of the first ECCE used by the corresponding EPDCCH.

As shown in the flow diagram in fig. 14, another example provides functionality 600 of computer circuitry of a processor on a User Equipment (UE) operable to conditionally allocate Physical Uplink Control Channel (PUCCH) resources in a Time Division Duplex (TDD) manner for a hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission in subframe n. The functionality may be implemented as a method or the functionality may be executed as instructions on a machine, where the instructions are included on at least one computer readable medium or one non-transitory machine readable storage medium. The computer circuitry can be configured to receive a downlink control channel within a previously specified subframe, where the previously specified subframe occurs in time before subframe n, as in block 610. The computer circuitry can then be further configured to, as in block 620: it is recognized that the downlink control channel type received in the previous designated subframe is a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH). The computer circuitry can also be configured to: when the received downlink control channel type is PDCCH, a PUCCH resource for HARQ-ACK transmission is determined using a lowest Control Channel Element (CCE) index of the PDCCH. The computer circuitry can also be configured to: when the received downlink control channel type is EPDCCH, PUCCH resources for HARQ-ACK transmission are determined using a lowest enhanced cce (ecce) index of the EPDCCH.

In an example, the previous specified subframe may comprise subframe n-K, wherein K ∈ K, and wherein a downlink association set index K is defined in table 10.1.3.1-1 (e.g., table 3) in third generation partnership project (3GPP) Long Term Evolution (LTE) standard release 11 Technical Specification (TS)36.213, and K may comprise a set of M elements { K, depending on subframe n and uplink/downlink (UL/DL) configuration₀，k₁，...k_M-1}. In another example, subframe n-k includes PDCCH and configured EPDCCH subframes.

In another example, the computer circuitry configured to determine the PUCCH resource for subframe n-k using the lowest ECCE index of the EPDCCH may be further configured to: PUCCH resources are determined using a parameter (e.g., Value). The parameter may be derived from an Acknowledgement (ACK)/negative ACK (ACK/NACK) resource offset (ARO), an Antenna Port (AP), a UE-specific starting offset value, and an integer m, where k_mIs the minimum value in the set K, such that the UE is in subframe n-K_mEPDCCH is detected.

For one configured serving cell and subframe n of M-1, where M is the set K ∈ { K }₀，k₁，...k_M-1Number of elements in the PDCCH configured to use the lowest CCE index n of the PDCCH_CCETo determine PUCCH resources for HARQ-ACK transmissionCan select the value of c from {0, 1, 2, 3} such that N is equal to_c≤n_CCE＜N_c+1And is an antenna port p₀Use byPUCCH resource representedAnd is an antenna port p₁Use byPUCCH resource representedWherein n is_CCEIs for sub-frame n-k_mFirst CCE index number of transmission of corresponding PDCCH and corresponding m, where k_mIs the minimum value in the set K to make the UE in subframe n-K_mIn the detection of the PDCCH,so as to makeIn terms of the downlink bandwidth configuration in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is the starting PUCCH channel index of the PUCCH region in the uplink subframe and is configured by the higher layer of each UE. Antenna port p₁May be used when two antenna port transmissions are configured. Lowest ECCE index n configured to use EPDCCH_ECCETo determine PUCCH resources for HARQ-ACK transmissionMay be an antenna port p₀Use byPUCCH resource representedAnd is an antenna port p₁Use byPUCCH resource representedWhere Value is a parameter, n_ECCEIs for sub-frame n-k_mMiddle EPDCCH setCorresponding EPDCCH and corresponding number of the first ECCE of the transmission of m, where k_mIs the minimum value in the set K to make the UE in subframe n-K_mDetecting EPDCCH setEPDCCH of (1). Antenna port p₁May be used when two antenna port transmissions are configured.

For one configured serving cell and subframe n for M > 1, where M is the set K ∈ { K }₀，k₁，...k_M-1The number of elements in the } and 0 ≦ i ≦ M-1, configured to use the lowest CCE index n_CCE，iTo determine PUCCH resources for HARQ-ACK transmissionThe computer circuitry of (a) can be represented by:wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，i＜N_c+1，n_CCE，iIs used in sub-frame n-k_iA first CCE index number used for transmitting a corresponding PDCCH,so as to makeIn terms of the downlink bandwidth configuration in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is the starting PUCCH channel index of the PUCCH region in the uplink subframe and is configured by the higher layer of each UE. Is configured to use the lowest ECCE index n_ECCE，iTo determine PUCCH resources for HARQ-ACK transmissionThe computer circuitry of (a) can be represented by:where Value is a parameter, n_ECCE，iIs used in sub-frame n-k_iMidamble EPDCCH setThe number of the first ECCE used by the corresponding EPDCCH.

For at least two configured serving cells and subframes n where M ≦ 2, where M is the set K ∈ { K ≦ K₀，k₁，...k_M-1Number of elements in, k on primary cell_m∈ K, 0 ≦ j ≦ A-1 and A ∈ {2, 3, 4}, configured to use the lowest CCE index n_CCE，mTo determine PUCCH resources for HARQ-ACK transmissionThe computer circuitry of (a) can be represented by:andwherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，m＜N_c+1，n_CCE，mIs used in sub-frame n-k_iA first CCE index number used for transmitting a corresponding PDCCH,so as to makeThe downlink bandwidth configuration from the primary cell in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is a starting PUCCH channel index of a PUCCH region in an uplink subframe and is configured by a higher layer of each UE,a transmission mode for subframe n and up to two transport blocks is supported on a serving cell where a corresponding Physical Downlink Shared Channel (PDSCH) transmission occurs. Is configured to use the lowest ECCE index n_ECCE，mTo determine PUCCH resources for HARQ-ACK transmissionThe computer circuitry of (a) can be represented by:andwhere Value is a parameter, n_ECCE，mIs used in sub-frame n-k_mIn-transmission is aggregated by EPDCCHThe corresponding DCI by the EPDCCH of (a) assigns the number of the first ECCE used,a transmission mode for subframe n and up to two transport blocks on the serving cell where the corresponding PDSCH transmission occurs is supported.

For at least two configured serving cells and subframes n for M > 2, where M is the set K ∈ { K }₀，k₁，...k_M-1Number of elements in (K) ∈ K, K on primary cell_m∈ K configured to use the lowest CCE index n_CCE，mTo determine PUCCH resources for HARQ-ACK transmissionThe computer circuitry of (a) can be represented by:wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，m＜N_c+1，n_CCE，mIs used in sub-frame n-k_mA first CCE index number used for transmitting a corresponding PDCCH,so as to makeThe downlink bandwidth configuration from the primary cell in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is the starting PUCCH channel index of the PUCCH region in the uplink subframe and is configured by the higher layer of each UE. Is configured to use the lowest ECCE index n_ECCE，mTo determine PUCCH resources for HARQ-ACK transmissionThe computer circuitry of (a) can be represented by:where Value is a parameter, n_ECCE，mIs used forIn sub-frame n-k_mMidamble EPDCCH setThe number of the first ECCE used by the corresponding EPDCCH.

In another example, for a third generation partnership project (3GPP) Long Term Evolution (LTE) standard release 11PUCCH format 1a or 1b, or 3GPP PUCCH LTE standard release 11 format 1b with channel selection, or 3GPP PUCCH LTE standard release 11 format 3, for mapping to antenna port pThe computer circuitry can use PUCCH resources for HARQ-ACK transmission in subframe n

Fig. 15 illustrates an example node (e.g., serving node 710 and cooperating node 750) and an example wireless device 720. The node may include node devices 712 and 752. A node device or node may be configured to communicate with a wireless device (e.g., UE). Node devices, devices at a node, or nodes may be configured to communicate with other nodes via a backhaul link 748 (optical link or wired link), such as an X2 application protocol (X2 AP). The node device may include processors 714 and 754 and transceivers 716 and 756. The transceiver may be configured to receive HARQ-ACK feedback in PUCCH resources. The transceivers 716 and 756 may also be configured to communicate with the cooperating nodes via the X2 application protocol (X2 AP). The processor may also be configured to implement a reverse procedure for PUCCH detection as disclosed herein. The serving node may generate both a primary cell (PCell) and a secondary cell (SCell). The nodes (e.g., serving node 710 and cooperating node 750) may include a Base Station (BS), a node b (nb), an evolved node b (enb), a baseband unit (BBU), a Remote Radio Head (RRH), a Remote Radio Equipment (RRE), a Remote Radio Unit (RRU), or a Central Processing Module (CPM).

A device (used by a node) may be configured to detect a Physical Uplink Control Channel (PUCCH) resource allocation made in a Time Division Duplex (TDD) manner for a hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission in subframe n. The transceivers 716 and 756 may be configured to receive PUCCH resources in subframe n configured with a downlink control channel type. Processors 714 and 754 may be configured to: determining when subframe n is configured with a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH); decoding a PUCCH resource for HARQ-ACK transmission using a lowest Control Channel Element (CCE) index of a Physical Downlink Control Channel (PDCCH) when the downlink control channel type is the PDCCH; and decoding a PUCCH resource for HARQ-ACK transmission using a lowest enhanced cce (ecce) index of the EPDCCH when the downlink control channel type is EPDCCH.

In an example, a downlink control channel type may be received in subframe n-K, where K ∈ K, and where a downlink association set index K is defined in table 10.1.3.1-1 (e.g., table 3) in third generation partnership project (3GPP) Long Term Evolution (LTE) standard release 11 Technical Specification (TS)36.213, and K comprises a set of M elements { K, depending on subframe n and uplink/downlink (UL/DL) configuration₀，k₁，...k_M-1}。

In another example, a processor configured to determine PUCCH resources for HARQ-ACK transmission using the lowest ECCE index of the EPDCCH may be further configured to: use byThe indicated parameter Value is used to decode the PUCCH resource, wherein an Acknowledgement (ACK)/negative ACK (ACK/NACK) resource offset (ARO) is an integer offset Value derived from Downlink Control Information (DCI) in the EPDCCH, an Antenna Port (AP) is a parameter (0., 3),is for EPDCCH setUE-specific starting offset value, mIs an integer, where k_mIs the minimum value in the set K, such that the UE is in subframe n-K_mDetection for EPDCCH setEPDCCH of (1).

A wireless device 720 (e.g., a UE) may include a transceiver 724 and a processor 722. A wireless device (i.e., device) may be configured to provide conditional Physical Uplink Control Channel (PUCCH) resource allocation in Time Division Duplex (TDD) for hybrid automatic repeat request-acknowledgement (HARQ-ACK) in subframe n, as described in 500 of fig. 13 or 600 of fig. 14.

Fig. 16 provides an example illustration of a wireless device, such as a User Equipment (UE), a Mobile Station (MS), a mobile wireless device, a mobile communication device, a tablet, a handset, or other type of wireless device. The wireless device may include one or more antennas configured to communicate with a node or transmission station, such as a Base Station (BS), evolved node b (enb), baseband unit (BBU), Remote Radio Head (RRH), Remote Radio Equipment (RRE), Relay Station (RS), Radio Equipment (RE), Remote Radio Unit (RRU), Central Processing Module (CPM), or other type of Wireless Wide Area Network (WWAN) access point. The wireless device may be configured to communicate using at least one wireless communication standard including 3GPP LTE, WiMAX, High Speed Packet Access (HSPA), bluetooth, and WiFi. The wireless device may communicate using a separate antenna for each wireless communication standard or a shared antenna for multiple wireless communication standards. The wireless devices may communicate in a Wireless Local Area Network (WLAN), a Wireless Personal Area Network (WPAN), and/or a WWAN.

Fig. 16 also provides a microphone and one or more speakers that may be used for audio input and output from the wireless device. The display screen may be a Liquid Crystal Display (LCD) display screen or other type of display screen such as an Organic Light Emitting Diode (OLED) display. The display screen may be configured as a touch screen. Touch screens may use capacitive, resistive, or another type of touch screen technology. The application processor and the graphics processor may be coupled to internal memory to provide processing and display capabilities. The non-volatile memory port may also be used to provide data input/output options to a user. The non-volatile memory port may also be used to expand the memory capabilities of the wireless device. The keyboard may be integrated with the wireless device or wirelessly connected to the wireless device to provide additional user input. A virtual keyboard may also be provided with a touch screen.

Various techniques, or certain aspects or portions thereof, may take the form of program code (i.e., instructions) embodied in tangible media, such as floppy diskettes, compact disc read only memories (CD-ROMs), hard drives, non-transitory computer-readable storage media, or any other machine-readable storage medium, wherein, when the program code is loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing the various techniques. The circuitry may include hardware, firmware, program code, executable code, computer instructions, and/or software. The non-transitory computer readable storage medium may be a computer readable storage medium that does not include a signal. In the case of program code execution on programmable computers, the computing device may include a processor, a storage medium readable by the processor (including volatile and non-volatile memory and/or storage elements), at least one input apparatus, and at least one output apparatus. The volatile and non-volatile memory and/or storage elements may be Random Access Memory (RAM), erasable programmable read-only memory (EPROM), flash drives, optical drives, magnetic hard drives, solid state drives, or other media for storing electronic data. The nodes and wireless devices may also include a transceiver module (i.e., transceiver), a counter module (i.e., counter), a processing module (i.e., processor), and/or a clock module (i.e., clock) or timer module (i.e., timer). One or more programs that may implement or utilize the various techniques described herein may use an Application Programming Interface (API), reusable controls, and the like. Such programs may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In either case, the language may be a compiled or interpreted language, and combined with hardware implementations.

It should be appreciated that many of the functional units described in this specification have been labeled as modules, in order to more particularly emphasize their implementation independence. For example, a module may be implemented as a hardware circuit comprising custom Very Large Scale Integration (VLSI) circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

Modules may also be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be organized as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different locations which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Similarly, operational data may be identified and illustrated herein within modules, and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may have been distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network. Modules may be passive or active, including agents that may be used to perform desired functions.

Reference throughout this specification to "an example" or "exemplary" means that a particular feature, structure, or characteristic described in connection with the example is included in at least one embodiment of the present invention. Thus, the appearances of the phrase "in an example" or the word "exemplary" in various places throughout this specification are not necessarily all referring to the same embodiment.

As used herein, a plurality of items, structural elements, compositional elements, and/or materials may be presented in a common list for convenience. However, these lists should be construed as though each member of the list is individually identified as a separate and unique member. Thus, no individual member of such list should be construed as a de facto equivalent of any other member of the same list solely based on their presentation in a common group without indications to the contrary. Furthermore, various embodiments and examples of the present invention may be referenced herein in conjunction with their various component alternatives. It is to be understood that such embodiments, examples, and alternatives are not to be considered as true equivalents of another embodiment, example, and alternatives, but are to be considered as separate and autonomous representations of the invention.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided, such as examples of layouts, distances, network examples, etc., to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other methods, components, arrangements, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

While the foregoing examples illustrate the principles of the invention in one or more particular applications, it will be apparent to those of ordinary skill in the art that numerous modifications in form, usage and details of implementation can be made without the exercise of inventive faculty, without departing from the principles and concepts of the invention. Accordingly, the invention is not intended to be limited, but only by the appended claims.

Claims (20)

1. A User Equipment (UE) operable to provide Physical Uplink Control Channel (PUCCH) resource allocation in a Time Division Duplex (TDD) manner for hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission in subframe n, having computer circuitry configured to

A first circuit configured to detect a downlink control channel within a previous designated subframe, the previous designated subframe received a time prior to subframe n; and a second circuit configured to:

determining that the downlink control channel detected within the previous designated subframe is one of a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH); and

determining a legacy PUCCH resource for the HARQ-ACK transmission when the downlink control channel detected in the previous designated subframe is PDCCH or determining an enhanced PUCCH resource for the HARQ-ACK transmission when the downlink control channel detected in the previous designated subframe is EPDCCH.

2. The circuit of claim 1, wherein the previous designated subframe comprises subframe n-K, where K ∈ K, where a downlink association set index K is defined in table 10.1.3.1-1 in third generation partnership project (3GPP) Long Term Evolution (LTE) standard release 11 Technical Specification (TS)36.213, and K comprises a set of M elements { K [/K ] depending on subframe n and uplink/downlink (UL/DL) configuration₀，k₁，...k_M-1}。

3. The circuit of claim 2, wherein an integer m is used to determine PUCCH resources for subframe n-k, where k is_mIs the minimum value in the set K, such that the UE is in subframe n-K_mEPDCCH is detected.

4. The circuit of claim 3, wherein for one configured serving cell and subframe n of M-1, M is the set K ∈ { K } K₀，k₁，...k_M-1Number of elements in (1):

the second circuit is further configured to use a lowest ECCE index n of the EPDCCH_ECCETo determine enhanced PUCCH resources for the HARQ-ACK transmissionIs an antenna port p₀Use byEnhanced PUCCH resources as representedAnd is an antenna port p₁Use byEnhanced PUCCH resources as representedWhere Value is a parameter, n_ECCEIs for sub-frame n-k_mMiddle EPDCCH setCorresponding EPDCCH and corresponding number of the first ECCE of the transmission of m, where k_mIs the minimum value in the set K to make the UE in subframe n-K_mDetecting EPDCCH setEPDCCH of (1), and antenna port p₁The method is used when two antenna ports are configured for transmission; or

The second circuitry is further configured to use a lowest CCE index n of PDCCH_CCETo determine legacy PUCCH resources for the HARQ-ACK transmissionSelecting c value from {0, 1, 2, 3} to make N_c≤n_CCE＜N_c+1And is an antenna port p₀Use byLegacy PUCCH resources as representedAnd is an antenna port p₁Use byLegacy PUCCH resources as representedWherein n is_CCEIs for sub-frame n-k_mAnd a first CCE index number of the transmission of the corresponding PDCCH and the corresponding m, where k_mIs the minimum value in the set K to allow the UE to detect the PDCCH in subframe n-km,so as to makeIn terms of the downlink bandwidth configuration in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is a starting PUCCH channel index of a PUCCH region in an uplink subframe and is configured by a higher layer of each UE, and an antenna port p₁When two antenna port transmissions are configured.

5. The circuit of claim 3, wherein M is the set K ∈ { K ] for one configured serving cell and subframe n where M > 1₀，k₁，...k_M-1The number of elements in the element is more than or equal to 0 and less than or equal to i and less than or equal to M-1:

the second circuit is further configured to use a lowest ECCE index n_ECCE，iTo determine enhanced PUCCH resources for the HARQ-ACK transmissionRepresented by the formula:where Value is a parameter, n_ECCE，iIs used in sub-frame n-k_iMidamble EPDCCH setThe number of the first ECCE of the corresponding EPDCCH; or the second circuitry is further configured to use the lowest CCE index n_CCE，iTo determine legacy PUCCH resources for HARQ-ACK transmissionRepresented by the formula:

wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，i＜N_c+1，n_CCE，iIs used in sub-frame n-k_iWhere a first CCE index number of a corresponding PDCCH is transmitted,so as to makeIn terms of the downlink bandwidth configuration in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is toThe starting PUCCH channel index of the PUCCH region in the downlink subframe is configured by the higher layer of each UE.

6. The UE of claim 3, wherein for at least two configured serving cells and subframes n for M ≦ 2, where M is the set K ∈ { K ≦ K₀，k₁，...k_M-1Number of elements in (c), k on primary cell_m∈ K, 0 ≦ j ≦ A-1 and A ∈ {2, 3, 4 }:

the second circuit is further configured to use a lowest ECCE index n_ECCE，mTo determine enhanced PUCCH resources for the HARQ-ACK transmissionRepresented by the formula:

andwhere Value is a parameter, n_ECCE，mIs used in sub-frame n-k_mIn-transmission is aggregated by EPDCCHThe number of the first ECCE of the corresponding DCI assignment made by the EPDCCH of (a), anda transmission mode for subframe n and supporting up to two transport blocks on a serving cell where a corresponding PDSCH transmission occurs; or

The second circuitry is further configured to use a lowest CCE index n_CCE，mTo determine legacy PUCCH resources for HARQ-ACK transmissionRepresented by the formula:

and

wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，m＜N_c+1，n_CCE，mIs used in sub-frame n-k_mWhere a first CCE index number of a corresponding PDCCH is transmitted,so as to makeThe downlink bandwidth configuration from the primary cell in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is a starting PUCCH channel index of a PUCCH region in an uplink subframe and is configured by a higher layer of each UE,a transmission mode for subframe n and up to two transport blocks is supported on a serving cell where a corresponding Physical Downlink Shared Channel (PDSCH) transmission occurs.

7. The UE of claim 3, wherein for at least two configured serving cells and subframes n for M > 2, where M is a set K ∈ { K } K₀，k₁，...k_M-1InK ∈ K, K on the primary cell_m∈K：

The second circuit is further configured to use a lowest ECCE index n_ECCE，mTo determine enhanced PUCCH resources for the HARQ-ACK transmissionRepresented by the formula:

where Value is a parameter, n_ECCE，mIs used in sub-frame n-k_mMidamble EPDCCH setThe number of the first ECCE of the corresponding EPDCCH; or the second circuitry is further configured to use the lowest CCE index n_CCE，mTo determine legacy PUCCH resources for HARQ-ACK transmissionRepresented by the formula:

wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，m＜N_c+1，n_CCE，mIs used in sub-frame n-k_mWhere a first CCE index number of a corresponding PDCCH is transmitted,so as to makeThe downlink bandwidth configuration from the primary cell in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is the starting PUCCH channel index of the PUCCH region in the uplink subframe and is configured by the higher layer of each UE.

8. The UE of claim 1, wherein the UE comprises an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, or a non-volatile memory port.

9. A non-transitory computer-readable medium encoded with computer-executable instructions that, when accessed, cause a machine to perform operations for conditional Time Division Duplex (TDD) Physical Uplink Control Channel (PUCCH) resource allocation at a User Equipment (UE) for hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission in subframe n, comprising:

detecting a downlink control channel within a previous designated subframe, the previous designated subframe received a time prior to subframe n;

determining that the downlink control channel detected within the previous designated subframe is one of a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH); and

determining a legacy PUCCH resource for the HARQ-ACK transmission when the detected downlink control channel received within the previously specified subframe is PDCCH or determining an enhanced PUCCH resource for the HARQ-ACK transmission when the downlink control channel detected within the previously specified subframe is EPDCCH.

10. The non-transitory computer-readable medium of claim 9 encoded with computer-executable instructions, whereinThen, the previously specified subframe comprises subframe n-K, where K ∈ K, where a downlink association set index K is defined in table 10.1.3.1-1 in third generation partnership project (3GPP) Long Term Evolution (LTE) standard release 11 Technical Specification (TS)36.213, and K comprises a set of M elements { K [/K ] depending on subframe n and uplink/downlink (UL/DL) configuration₀，k₁，...k_M-1}。

11. The non-transitory computer-readable medium encoded with computer-executable instructions of claim 10, further comprising using a computer program productA parameter Value is expressed to determine the enhanced PUCCH resources, wherein an Acknowledgement (ACK)/negative ACK (ACK/NACK) resource offset (ARO) is an integer offset Value derived from Downlink Control Information (DCI) in the EPDCCH, an Antenna Port (AP) is a parameter (0., 3),is for EPDCCH setM is an integer, where k is a starting offset value specific to the UE of (1)_mIs the minimum value in the set K, such that the UE is in subframe n-K_mDetection for EPDCCH setEPDCCH of (1).

12. The non-transitory computer-readable medium encoded with computer-executable instructions of claim 11, wherein for one configured serving cell and subframe n of M-1:

further comprising using the lowest CCE index n of PDCCH_CCETo determine legacy PUCCH resources for HARQ-ACK transmissionFurther comprising selecting the value of c from {0, 1, 2, 3} such that N is equal to_c≤n_CCE＜N_c+1And is an antenna port p₀Use byLegacy PUCCH resources as representedAnd is an antenna port p₁Use byLegacy PUCCH resources as representedWherein n is_CCEIs for sub-frame n-k_mAnd a first CCE index number corresponding to the transmission of m, where k is_mIs the minimum value in the set K to make the UE in subframe n-K_mIn the detection of the PDCCH,so as to makeIn terms of the downlink bandwidth configuration in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is the starting PUCCH channel index of the PUCCH region in the uplink subframe and is done by the higher layers of each UEArrangement of, among others, antenna port p₁The method is used when two antenna ports are configured for transmission; or

Further comprising using the lowest ECCE index n of the EPDCCH_ECCETo determine enhanced PUCCH resources for the HARQ-ACK transmissionFurther comprising an antenna port p₀Use byEnhanced PUCCH resources as representedAnd is an antenna port p₁Use byEnhanced PUCCH resources as representedWherein n is_ECCEIs for sub-frame n-k_mMiddle EPDCCH setCorresponding EPDCCH and corresponding number of the first ECCE of the transmission of m, where k_mIs the minimum value in the set K to make the UE in subframe n-K_mDetecting EPDCCH setEPDCCH of (1), and antenna port p₁When two antenna port transmissions are configured.

13. The non-transitory computer-readable medium encoded with computer-executable instructions of claim 11, wherein for one configured serving cell and subframe n where M > 1, where 0 ≦ i ≦ M-1:

further comprises makingIndexing n with the lowest CCE_CCE，iTo determine legacy PUCCH resources for HARQ-ACK transmissionRepresented by the formula:

wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，i＜N_c+1，n_CCE，iIs used in sub-frame n-k_iWhere a first CCE index number of a corresponding PDCCH is transmitted,so as to makeIn terms of the downlink bandwidth configuration in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is a starting PUCCH channel index of a PUCCH region in an uplink subframe and is configured by a higher layer of each UE; or

Further comprising using the lowest ECCE index n_ECCE，iTo determine enhanced PUCCH resources for the HARQ-ACK transmissionRepresented by the formula:wherein n is_ECCE，iIs used inFrame n-k_iMidamble EPDCCH setThe number of the first ECCE of the corresponding EPDCCH.

14. The non-transitory computer-readable medium encoded with computer-executable instructions of claim 11, wherein k is on a primary cell for at least two configured serving cells and subframe n where M ≦ 2_m∈ K, 0 ≦ j ≦ A-1 and A ∈ {2, 3, 4 }:

further using the lowest CCE index n_CCE，mTo determine legacy PUCCH resources for HARQ-ACK transmissionRepresented by the formula:

and

wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，m＜N_c+1，n_CCE，mIs used in sub-frame n-k_iWhere a first CCE index number of a corresponding PDCCH is transmitted,so as to makeThe downlink bandwidth configuration from the primary cell in units,is the size of a resource block in the frequency domain expressed in a number of sub-carriers,is a starting PUCCH channel index of a PUCCH region in an uplink subframe and is configured by a higher layer of each UE, whereinA transmission mode for subframe n and supporting up to two transport blocks on a serving cell where a corresponding Physical Downlink Shared Channel (PDSCH) transmission occurs; or

Further using the lowest ECCE index n_ECCE，mTo determine enhanced PUCCH resources for the HARQ-ACK transmissionRepresented by the formula:andwherein n is_ECCE，mIs used in sub-frame n-k_mIn-transmission is aggregated by EPDCCHThe corresponding DCI assigned number of the first ECCE made by the EPDCCH of (1), anda transmission mode for subframe n and up to two transport blocks on the serving cell where the corresponding PDSCH transmission occurs is supported.

15. The non-transitory computer-readable medium encoded with computer-executable instructions of claim 11, wherein k ∈ is for at least two configured serving cells and subframe n for M > 2, whereK on the primary cell_m∈K：

Further using the lowest CCE index n_CCE，mTo determine legacy PUCCH resources for HARQ-ACK transmissionRepresented by the formula:

wherein c is selected from {0, 1, 2, 3} such that N is_c≤n_CCE，m＜N_c+1，n_CCE，mIs used in sub-frame n-k_mA first CCE index number used for transmitting a corresponding PDCCH,so as to makeThe downlink bandwidth configuration from the primary cell in units,is a size of a resource block in a frequency domain expressed by a plurality of subcarriers, andis a starting PUCCH channel index of a PUCCH region in an uplink subframe and is configured by a higher layer of each UE; or

Further using the lowest ECCE index n_ECCE，mTo determine enhanced PUCCH resources for the HARQ-ACK transmissionRepresented by the formula:wherein n is_ECCE，mIs used in sub-frame n-k_mMidamble EPDCCH setThe number of the first ECCE of the corresponding EPDCCH.

16. A User Equipment (UE) operable to provide Physical Uplink Control Channel (PUCCH) resource allocation in a Time Division Duplex (TDD) manner for a hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission in subframe n, the User Equipment (UE) having one or more processors configured to:

identifying, using the one or more processors, that a detected downlink control channel type within a previous designated subframe is a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH), wherein the previous designated subframe was received a time prior to subframe n;

determining, by using the one or more processors, a legacy PUCCH resource for the HARQ-ACK transmission using a lowest Control Channel Element (CCE) index of a Physical Downlink Control Channel (PDCCH) when the downlink control channel is the PDCCH; and

when the downlink control channel type is EPDCCH, determining, using the one or more processors, an enhanced PUCCH resource for the HARQ-ACK transmission using a lowest Control Channel Element (CCE) index of the EPDCCH.

17. The UE of claim 16, wherein the downlink control channel type is received in a subframe n-K, where K ∈ K, where a downlink association set index K is defined in table 10.1.3.1-1 in third generation partnership project (3GPP) Long Term Evolution (LTE) standard release 11 Technical Specification (TS)36.213, and K comprises a set of M elements { K } depending on subframe n and uplink/downlink (UL/DL) configuration₀，k₁，...k_M-1}。

18. The UE of claim 17, further configured to determine PUCCH resources for subframe n-k using an integer m, where k is_mIs the minimum value in the set K, such that the UE is in subframe n-K_mEPDCCH is detected.

19. The UE of claim 16, further configured to use a UE configured to receive a request from a mobile stationA parameter Value is indicated to decode the enhanced PUCCH resources, wherein an Acknowledgement (ACK)/negative ACK (ACK/NACK) resource offset (ARO) is an integer offset Value derived from Downlink Control Information (DCI) in the EPDCCH, an Antenna Port (AP) is a parameter (0,.., 3),is for EPDCCH setM is an integer, where k is a starting offset value specific to the UE of (1)_mIs the minimum value in the set K, such that the UE is in subframe n-K_mDetection for EPDCCH setEPDCCH of (1).

20. The UE of claim 16, wherein the UE comprises an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, or a non-volatile memory port.